Olds Daniel, Mills Rebecca A, McDonnell Marshall T, Liu Jue, Kim Joshua R, Dunstan Matthew T, Gaultois Michael W, Everett S Michelle, Tucker Matthew G, Page Katharine
Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6454, USA.
Department of Chemistry, University of Cambridge, Cambridge, United Kingdom.
Rev Sci Instrum. 2018 Sep;89(9):092906. doi: 10.1063/1.5033464.
We present the design and capabilities of a high temperature gas flow environment for neutron diffraction and pair distribution function studies available at the Nanoscale Ordered Materials Diffractometer instrument at the Spallation Neutron Source. Design considerations for successful total scattering studies are discussed, and guidance for planning experiments, preparing samples, and correcting and reducing data is defined. The new capabilities are demonstrated with an decomposition study of a battery electrode material under inert gas flow and an carbonation/decarbonation experiment under reactive gas flow. This capability will aid in identifying and quantifying the atomistic configurations of chemically reactive species and their influence on underlying crystal structures. Furthermore, studies of reaction kinetics and growth pathways in a wide variety of functional materials can be performed across a range of length scales spanning the atomic to the nanoscale.
我们介绍了一种高温气流环境的设计及功能，该环境可用于散裂中子源的纳米级有序材料衍射仪上进行中子衍射和对分布函数研究。讨论了成功进行全散射研究的设计考量，并明确了实验规划、样品制备以及数据校正与简化的指导原则。通过在惰性气流下对电池电极材料进行分解研究以及在反应性气流下进行碳化/脱碳实验，展示了这些新功能。此功能将有助于识别和量化化学反应物种的原子构型及其对基础晶体结构的影响。此外，还可在从原子尺度到纳米尺度的一系列长度范围内，对各种功能材料中的反应动力学和生长途径进行研究。
